DE20210990U1 - Brewing head for an espresso machine - Google Patents

Description

Brewing head for an espresso machine

The invention relates to a brewing head for an espresso machine with a brewing head upper part with an inlet for the brewing water, with a brewing head lower part with an outlet for the brewed espresso coffee, with a device for supplying a coffee portion, with an ejector for the brewed coffee bag.

A certain category of well-known espresso machines has a brewing head for holding portioned and partially pre-compressed coffee bags.

In these espresso machines, the brewing head consists of a brewing head part that is firmly connected to the machine and a brewing head part that can be locked and removed.

However, there are also espresso machines in which a brewing head part is connected to the brewing head part that is firmly connected to the espresso machine in an articulated manner or is movable coaxially to the brewing head.

In such previously known systems, the coffee bag is inserted by hand into the opened and preheated or hot brewing head. There is always a risk that the user will burn their fingers when touching the brewing head.

The same danger exists when removing the coffee bag after the brewing process.

Another problem with espresso machines with a bayonet-like locking mechanism for the brewing head parts is that the paper edge of the coffee bag gets crushed, which makes it even more difficult to remove the bag from the hot brewing head and increases the risk of burning your fingers.

The object of the invention is to create an espresso machine which has a structure such that the aforementioned disadvantages are eliminated.

This object is achieved according to the invention by the features specified in claim 1.

This means that the coffee bag is automatically ejected from the brewing head after the brewing process. It is no longer necessary to remove the used and hot coffee bag with your fingers. Inserting the coffee bag into the brewing chamber, closing and opening the brewing chamber and ejecting the used coffee bag is all done with just one operating lever.

Further advantageous embodiments of the innovation emerge from the subclaims.

In an advantageous embodiment of the innovation, the brewing head upper part is equipped with a support which serves to hold the brewing head lower part. The brewing head lower part is mounted coaxially adjustable to the brewing head upper part both to hold the coffee bag and to close the brewing chamber.

To eject the coffee bag, the brewing head lower section is pivoted on an axis.

The coffee bag is transported to the brewing chamber using a carriage. The carriage movement is controlled using the hand lever.

The brewing chamber is opened and closed using the hand lever. The coffee bag is ejected after the brewing process by swinging out the lower part of the brewing head using the hand lever.

The innovation is explained in more detail below using an example implementation, from which further important features emerge.

Show it:

Fig.1. A side view of the brewing head according to the innovation with a partial sectional view of the brewing chamber, with one coffee bag in the closed brewing chamber and another lying on the carriage.

Fig. 2. The front view of the new brewing head with the brewing head lower part in the lowered position and the brewing chamber open.

Fig. 3 The side view of the brewing head, with the brewing chamber open and the brewing head base in the ejection position. The carriage with a fresh coffee bag has been pulled to the center of the brewing head.

Fig. 4 The side view of the brewing head with the brewing head lower part in the swinging back position by pulling the pull rod. The brewed coffee bag is ejected by the ejection spring.

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Description

The embodiment represents the brewing head unit of an espresso machine. The brewing head unit essentially consists of the brewing head upper part (i), with a brewing chamber seal (5), the water inlet 6, with the distributor sieve 3, with the carrier 21 and the brewing head lower part 2, with the brewing sieve 4, with the coffee outlet 7, which is pivotably connected in the carrier 21 to the eccentric axis 17 and axially displaceable to the brewing head upper part 1.

A locking lever 13 is arranged on both sides of the brewing head lower part 2 with the coffee outlet 7, which is pivotably mounted on the eccentric shaft 7.

The carriage carrier 16 connected to the carrier 21, with the guide pins 20, serves to guide a carriage 10 with a tension spring 9, which is guided so as to be horizontally displaceable towards the center of the brewing head upper part 1.

On the carrier 21 there is a locking device for the carriage 10, consisting of the locking spring 25, the locking pin 24 and the release pin 14.

A spring 27 for the return movement of the brewing head lower part 2 is arranged on the eccentric axis 17 carrying the brewing head lower part 2.

On one arm of the locking lever 13 is a reset device consisting of the

Axle lever 15, the tension rod 11 and the coupling pin 19.

Before the coffee portion is transported or drawn into the brewing chamber 12, the latter is first opened by pivoting the locking lever 13 upwards. This lowers the brewing head lower part 2. In the lowest lifting position, the guide cam 22 reaches the circular guide slot 18. The brewing head lower part 2, which is pivotably mounted on the eccentric axis 17, now pivots out under the tension force of the spring 27.

The pivoting movement is limited by the guide cam 22 in the guide slot 18. As a result of the pivoting movement of the brewing head lower part 2, the carriage (10) with the inserted coffee bag 8 is simultaneously pulled towards the centre of the brewing head by means of the drive pin 23.

By pulling the pull rod 11, the brewing head lower part 2 is pivoted into the vertical starting position by means of the axle lever 15, which is connected to the pull rod 11 by the coupling pin 19. The spring 27 is pre-tensioned by the pivoting movement.

With the pull rod 11 still pulled, the locking lever 13 is now pressed down.

As a result, the brewing head lower part 2 is lifted and pressed against the brewing chamber seal 5 of the brewing head upper part 1, whereby the brewing chamber 12 with the inserted coffee bag 8 is closed.

The release cam 26 presses against the locking pin 14. This pushes the locking spring 25 away, pulling the locking pin 24 and the

Slide 10 unlocked The tension spring 9 now pulls the slide 10 back between the brewing head upper part 1 and the brewing head lower part 2 .

The retraction function of the carriage 10 is designed so that the retraction takes place shortly before the pressure-tight closure of the brewing chamber 12. After the brewing chamber 12 is closed, a pump (not described in detail here) presses the brewing water through the brewing water inlet 6 into the brewing chamber 12, whereby the coffee bag is extracted. The brewed coffee runs out of the brewing unit through the coffee outlet 7.

The brewing chamber 12 is opened according to the functional sequence already described. The brewed coffee portion 8 is ejected by the swiveling movement following the lower part 2 of the brewing head. In order to ensure reliable ejection even when the coffee bag 8 is firmly attached to the lower part 2 of the brewing head, the coffee bag 8 is ejected from the lower part 2 of the brewing head by the ejector 28 when the lower part 2 of the brewing head is swiveled back.

As already mentioned, the above-mentioned embodiment of the espresso machine only represents an example of the state of innovation, which is in no way limited to that alone.

In fact, further embodiments of the subject matter of the innovation are conceivable. All features evident from the description and the drawings are essential to the innovation, even if they are not expressly claimed.

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L istence of references

1. Brewing head top

2. Brewing head lower part

3. Distribution sieve

4. Brewing sieve

5. Brewing chamber seal

6. Brewing water inlet

7. Coffee outlet

8. Coffee bags

9. Tension spring

10. Sledge

11. Tension rod

12. Brewing chamber

13. Locking lever

14. Release pin

15. Axle lever

16. Sledge carrier

17. Eccentric axis

18. Guide slot

19. Dome pin

20. Guide pin 2 I.Beam

22. Guide cam

23. Driving pin

24. Locking pin

25. Locking spring

26. Release cam

27. Spring

28. Ejector

Claims (10)

1. Brewing head for an espresso machine, in a housing, consisting of a brewing head upper part ( 1 ), with a brewing chamber seal ( 5 ), with a carrier ( 21 ), with a brewing water inlet ( 6 ), with a distributor sieve ( 3 ), with a carriage carrier ( 16 ), with the carriage ( 10 ) for feeding the coffee bag ( 8 ), with the brewing head lower part ( 2 ), with a brewing sieve ( 4 ), with a coffee outlet ( 7 ), with a pull rod ( 11 ), with an eccentric axis ( 17 ), with a locking lever ( 13 ), wherein the brewing head lower part ( 2 ) is tiltable about the eccentric axis ( 17 ) and is mounted so as to be axially displaceable relative to the brewing head upper part ( 1 ). 2. Brewing head according to claim 1, characterized in that the eccentric axis ( 17 ) is mounted in a lifting manner with the locking lever ( 13 ) in the carrier ( 21 ), which forms a unit with the brewing head upper part ( 1 ) and effects the pressure-tight closure of the brewing chamber ( 12 ). 3. Brewing head according to claim 1 and 2, characterized in that the brewing head upper part ( 1 ) is connected to the carriage carrier ( 16 ). 4. Brewing head according to one of claims 1 to 3, characterized in that the carriage carrier ( 16 ) has the carriage ( 10 ) for receiving a coffee bag ( 8 ), the direction of movement of which runs into the center of the brewing head center. 5. Brewing head according to one of claims 1 to 4, characterized in that the carriage ( 10 ) is coupled to the brewing head lower part ( 2 ) by means of a driver pin ( 23 ). 6. Brewing head according to one of claims 1-5, characterized in that the carrier ( 21 ) has guide slots ( 18 ) for limiting the movement of the brewing head lower part ( 2 ). 7. Brewing head according to one of claims 1-6, characterized in that an axle lever ( 15 ) of the eccentric axle ( 17 ) is articulated to a tension rod ( 11 ) by means of a coupling pin ( 19 ). 8. Brewing head according to one of claims 1 to 7, characterized in that the brewing head lower part ( 2 ) has a release cam ( 26 ). 9. Brewing head according to one of claims 1 to 8, characterized in that the carrier ( 21 ) has a locking spring ( 25 ) with a release pin ( 14 ) and a locking pin ( 24 ). 10. Brewing head according to one of claims 1 to 9, characterized in that the carrier ( 21 ) has an ejector ( 28 ).